cluster_id sec_channel
0 0
1 0
2 2
3 1
4 0
5 2
6 2
7 2
8 3
9 2
10 0
11 0
12 2
13 2
14 1
15 3
16 3
17 3
18 1
19 0
20 3
21 1
22 0
23 3
24 3
25 0
26 3
27 1
28 1
29 2
30 1
31 1